Measurement of cosmic-ray low-energy antiproton spectrum with the first BESS-Polar Antarctic flight

The BESS-Polar spectrometer had its first successful balloon flight over Antarctica in December 2004. During the 8.5-day long-duration flight, almost 0.9 billion events were recorded and 1,520 antiprotons were detected in the energy range 0.1-4.2 GeV. In this paper, we report the antiproton spectrum...

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Bibliographic Details
Main Authors: Abe, K., Fuke, H., Haino, S., Hams, T., Itazaki, A., Kim, K. C., Kumazawa, T., Lee, M. H., Makida, Y., Matsuda, S., Matsumoto, K., Mitchell, J. W., Moiseev, A. A., Myers, Z., Nishimura, J., Nozaki, M., Orito, R., Ormes, J. F., Sasaki, M., Seo, E. S., Shikaze, Y., Streitmatter, R. E., Suzuki, J., Takasugi, Y., Takeuchi, K., Tanaka, K., Yamagami, T., Yamamoto, A., Yoshida, T., Yoshimura, K.
Format: Text
Language:unknown
Published: arXiv 2008
Subjects:
Astrophysics astro-ph
FOS Physical sciences
Antarctic
Antarc*
Antarctica
Online Access:https://dx.doi.org/10.48550/arxiv.0805.1754
https://arxiv.org/abs/0805.1754
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Summary:The BESS-Polar spectrometer had its first successful balloon flight over Antarctica in December 2004. During the 8.5-day long-duration flight, almost 0.9 billion events were recorded and 1,520 antiprotons were detected in the energy range 0.1-4.2 GeV. In this paper, we report the antiproton spectrum obtained, discuss the origin of cosmic-ray antiprotons, and use antiprotons to probe the effect of charge sign dependent drift in the solar modulation. : 18 pages, 1 table, 5 figures, submitted to Physics Letters B

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